Question: What are the colors of coal that have a sign language label of Csc-negre-spreadthesign.ogv?
Paraphrase: What are the colors of coal that have a sign dialect name of Csc-negre-spreadthesign.ogv?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q24489 wdt:P462 ?answer . ?answer wdt:P2919 ?x FILTER(contains(?x , 'Csc-negre-spreadthesign.ogv'))}